结构公式

A third order ENO finite volume method for hyperbolic conservation laws on unstructured triangular mesh is introduced.In order to obtain the third order accuracy on spatial discretization,a weighted quadratic interpolation is constructed on every triangular mesh.Two point Gauss quadrature formula is also used on each edge of every triangular mesh and the third order TVD Runge-Kutta method is used for time discretization.The numerical order of convergence and the numerical result of a mesh 3 wind tunnel with one step are given.

摘 要 基于双曲型守恒律方程，对非结构三角形网格给出了一种ENO(Essentially Nonoscillatory Scheme)型有限体积格式，方法的主要思想是先对每一个三角形单元构造一个加权的二次插值多项式，而在计算交界面的流通量时采用了两点高斯积分公式以保证格式的整体精度，时间离散采用三阶TVD Runge-Kutta方法。

What was more important, the coupling loss factor of gemel coupling structure had been analysised detailedly thoeretically and experimentally.

同时通过理论推导和试验验证，较系统地推导了车辆上常见的铰链耦合结构的耦合损耗因子计算公式，完善了统计能量分析的理论框架。

The paper focus on the detailed structure of the optical system in helmet mounted electro optical sight scanning system,and makes analysis of the principle error caused by ten side prism reflector non direction fit axis rotation in measuring its head position,it further derives two formulas for base line correction and goniometry correction.

就某型光电头盔瞄准具扫描部件光学系统具体结构，分析研究了其头位测量中十棱镜反射面非共面定轴转动所致原理误差，导出了基线校正、测角校正两种校正公式。

Employing the GREEN theorem, the boundary integral equations for solving the ground surface potential are derived for the first time, both for one object underground and for complicated geological structure.

利用格林公式首次推导出了单一目标体和复杂地质结构两种情况下直流电阻率正演模拟中求解表面电位的边界积分方程。

The successfully designed steel ropes with the specialized ground tackle,which is used to connect with experimental machine,together with a set of revised casting technology of steel rope ends that used in labs can be used in relevant researches.In the research the following significant achievements are made:a set of S-N diagrams and their equations,Goodman Smith figures and an empirical f...

设计成功的钢丝绳与试验机联接的专用锚具、优化出的一套试验室条件下的绳头浇铸工艺，可应用于相关研究工作；研究得到的S -N曲线族及其曲线方程、Goodman -Smith图和疲劳强度计算经验公式、钢丝绳的拉伸疲劳性能和疲劳破坏规律、从宏、微观两个方面对钢丝绳疲劳破坏机理进行的初步研究等等，对钢丝绳结构工程设计人员具有一定的参考价值。

The DFP method is proved a officient one in processing unconstrainted optimization problem, so in this thesis, used the idea of mechanical structural optimization for reference analytically and extended modified formula of DFP—matrix to shape optimiation the DFP—Hamilton function method is put forward.

由于变尺度方法是有效的无约束优化方法，本文在分析的基础上借鉴了机械结构参数优化的思想，并将变尺度矩阵的修正公式扩展至形状优化中去，进而提出了变尺度—H函数极值法，并用其解决了梁、柱和复杂曲面的形状优化设计问题，取得了较好的效果。

This paper synthetically analyzes the factors which affect the efficiency of the helicoid thermal separator based on the study and the application.

根据多年来实验研究和推广应用，综合分析了影响旋转式热分离机效率的若干因素，并就脉冲管各主要能量损失与结构参数、运行参数之间的相互关系进行了讨论，提出了改进措施，同时在实验的基础上导出了最佳管长的半经验公式。

Basic principles of hydromechanics applied, a formula to calculate the parameter of the distributing plate is deduced.

应用流体力学基本原理，得出了形成稳定液位的分布板结构设计的计算公式。

In fact, the construction of the geometry structure would be ill-use of a series of qualified formula in tensor analysis and where there is perplexity about coordinate system, reference system and geometry space.

事实上，相关几何结构的构建不仅混淆了坐标系、参照系、几何空间等彼此不同的基本概念，而且，只是对张量分析中若干"条件成立"公式的滥用。

Professor Chen Xingshen achievements in order to affirm and encourage the development of our young mathematicians to contribute to the cause of China's Mathematical What he has in-depth introduction to the mathematics outside the field of theoretical physics to become an important tool G introduced geometric structure of the equivalent problem, a 20th century one of the major developments of mathematics, Integral geometry for the generalized basis, access to basic kinematics formulas.

为了肯定陈省身教授的功绩，激励我国中青年数学工作者对发展我国的数学事业做出贡献他引入的东西已深入到数学之外的领域，成为理论物理的重要工具，引进了G 几何的结构，研究其等价问题，成为20世纪后数学的主要发展之一，为广义的积分几何奠定基础，获得基本运动学公式。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。